[bootlin/training-materials updates] master: Kernel configuration: add example with both types of dependencies (5ec42ea9)

Michael Opdenacker michael.opdenacker at bootlin.com
Sat May 23 23:25:26 CEST 2020

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/5ec42ea9c8c6726db33643bf5678f647e0a77a75


commit 5ec42ea9c8c6726db33643bf5678f647e0a77a75
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Sat May 23 23:25:26 2020 +0200

    Kernel configuration: add example with both types of dependencies
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


 slides/sysdev-kernel-building/kconfig-dependencies.png | Bin 0 -> 94705 bytes
 .../sysdev-kernel-building/sysdev-kernel-building.tex  |  17 +++++++++++------
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/slides/sysdev-kernel-building/kconfig-dependencies.png b/slides/sysdev-kernel-building/kconfig-dependencies.png
new file mode 100644
index 00000000..7f69acb3
Binary files /dev/null and b/slides/sysdev-kernel-building/kconfig-dependencies.png differ
diff --git a/slides/sysdev-kernel-building/sysdev-kernel-building.tex b/slides/sysdev-kernel-building/sysdev-kernel-building.tex
index 680cb799..1106f7b6 100644
--- a/slides/sysdev-kernel-building/sysdev-kernel-building.tex
+++ b/slides/sysdev-kernel-building/sysdev-kernel-building.tex
@@ -26,12 +26,12 @@
   First, specify the architecture for the kernel to build
   \item Set it to the name of a directory under \kdir{arch}:\\
-  	\code{export ARCH=arm}
+	\code{export ARCH=arm}
   \item By default, the kernel build system assumes that the
         kernel is configured and built for the host architecture
 	(\code{x86} in our case, native kernel compiling)
   \item The kernel build system will use this setting to:
-  	\begin{itemize}
+	\begin{itemize}
 	\item Use the configuration options for the target
 	\item Compile the kernel with source code and headers
@@ -150,7 +150,7 @@
   \frametitle{Kernel option types}
-  There are different types of options
+  There are different types of options, defined in \code{Kconfig} files:
   \item \code{bool} options, they are either
@@ -169,13 +169,15 @@
   \frametitle{Kernel option dependencies}
+  There are dependencies between kernel options
-  \item There are dependencies between kernel options
   \item For example, enabling a network driver requires the network
     stack to be enabled
-  \item Two types of dependencies
+  \item Two types of dependencies:
+  \begin{columns}
+  \column{0.5\textwidth}
     \item \code{depends on} dependencies. In this case, option B that
       depends on option A is not visible until option A is enabled
@@ -184,6 +186,9 @@
       automatically enabled. In particular, such dependencies are
       used to declare what features a hardware architecture supports.
+  \column{0.4\textwidth}
+    \includegraphics[width=\textwidth]{slides/sysdev-kernel-building/kconfig-dependencies.png}
+  \end{columns}
   \item With the \code{Show All Options} option, \code{make xconfig} allows
     to see all options, even the ones that cannot be selected because of
     missing dependencies. Values for dependencies are shown.

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